| for a passive linear two-terminal element of two-terminal circuit with terminals A and B under sinusoidal conditions, quotient of the phasor representing the electric current in the element or circuit by the phasor representing the voltage (131-11-56) between the terminals |
where the sinusoidal electric current represented by the phasor is taken positive if its direction is from A to B or negative if its direction is from B to A and where the sinusoidal voltage represented by the phasor is the difference of the electric potentials at terminals at A and at B
Note 1 to entry: The admittance of an element or circuit is the inverse of its impedance. It is equal to , where G is conductance for alternating current, B is susceptance, Y is apparent admittance, and φ is displacement angle.
Note 2 to entry: The coherent SI unit of admittance is siemens, S.